Carbureter.



G. KINGSTON.

CAHBURETEH.

APPLICATION lLDv IAN` 5I \.9I2.

1,168,5 13, I Patented Jan. 18, 1916.

3 sains-sneer I.'

in pe do@ G EORGE KINGSTON, OF XOXOMO, INDIANA.

CARBU BETER.

Speoitlcatlon o! Letter: Patent.

Patented Jan. 18, 1916.

Application tiled January 5, 1912. Serial 110,868,631.

To attac/ioni. it may concern:

'Befipknownthat Ltirzonei: Kixesrox, a citizenof the United States of America, residiii atflekomo, in the ,county of Howard aridi' tate of'lndia'na, have invcntedcertain new' "and useful lmproveinents in Carbureters,`jof.wliieli the following is a specifica- 'tiongfreferenee being had therein to the ae eoinpanyin'g Adrawings.

` Tliisini-ention relates to carbureters of the t`ype in lwhich the su )ply of gasolene is controlled by a float, and its object is to provide a construction which will insure the even supply and-accurate regulation ofthe feed at a l Speeds of the motor, vthe invention consisting inthe pi'ovidiiigofa construction in which ca-rbureted charges are supplied, dur-. inglthc normal running` of the motor, to a manually 'controlled v main air passage through.nnmuxiliary air passage n-'which the..fuel.iislatoinicd by the air passing lthere-v throiigliand bythe head .of fuel Lmaintained by t.lieflo'at, Acharges for: runningat;4 low speeds being supplied by the auxiliary passa efonly, xi y heiinvention further consists :in: providirigceittainothen-new and use ful features in tlicfconstruction-v andarrangement of4 parts, all as.hereinaftcranore fully set'forth and particularly'pointed-.out in the claims, reference.. being; had to bhe. accompanying drawings;- in` w.liicli-.

Figiirel is asidefelcvation ofadcviceeinbedyin'g.. the-invention with .parts brokenaway to-'shoivtheconstruction; Fig. .Zris a. viewof the'saine-taken at right angles there` to,witl\` parts-broken away and in section; Iiyra'is a horizontal section'onitho linerm oiEjFi'g,A 1; Figui iusectional detail ofiono ci tho-spray nozzles; Figari is a Apers icctive view. of a throttle-valve detachedanti: Fig.0 isa .detaill view-showing n modified :form-ot throttlevalve inplace.A

As shown-inthe dnawings,.1 is a body of the'A carburetorv formingtafiloat.ehamben- 2 which-is closed-at itsupper-end by recap, or heath-3. having,amaxial tubulaeportiont extending. downward 'in.;the float chamber aud foptming llirough the bottomy thereof," .forniiu'g..a ,centrale `vertical' air passage 5 througliithecarburcter tothe upper endk of which the intake pipe or manifold of the engine may be secured. A float-6 in the float.

.bores in each member forms an auxiliary air inlet passage 11 opening through the top ofthe head 3 at its upper end, andthe other bore in each member ferais a feed passage 12 which communicates at its lower end with the lower end of the adjacent passage 11 through radial ducts 13 'and an annular. connccting duct 15 4formed in the end of a screw plug or spray nozzle 14 screwed into. thecend of said passage, and-through .a ductl` con'- neetiufr said annularduct and the-lower-end of said passage 11. A sinall'- axial bore 17 in tbepuig 14 serves as a:passageto admit' gasolcne from tlie'iloat-chainber into the-passage 12 and tliisgasoleue-inlet scoutrolled by a needle valve 18, the-stem 19 of.which extends outward in said passage'andis enlarged and screw-thrcaded at its outer end to close the outer orupper'end of the-passage andto provide an adjustment forthe, valve and its stem which may be turned by means ofa head .50 on its outer cud.' A like arranmanaut of spray nozzle and needle valve is provided in eaehofthe members Siand 0, and outlet openings 21 and22 for the passages 12 are provided intermediate-the-ends thereof -abovethe normal level at which the rasolcne is maintained inthe float' chamberiy the` floatI these outlets opening: directly into the inninair passage() through oppositesides thereof.4 to deliverthereto theair which-is drawn througlrthe-passages 11 npon the suctioirstroke of the enr'ine andpasses through the ducts 13 around the gnsolene inlct- 17, atomi/.ing the fuel as it enters the passages 19. and thoroughly-carbureting-the air before it enters the main air passage leading to the engine. Y

The main air passage 5 is controlled by a throttle valve 23 secured upon a transverse spindle 24 by screws 33 indicated in dotted lines in Fig. l, inserted in openings 34 in the valve member, said spindle being mounted in bearings in the sides of the tube 4 and actuated by means of a lever 25 on its outer end to turn the valve within the air passage. The valve body is ellipsoidal in form, and its major axis is of greater length than the diameter of the-air passage so that when turned upon its minor axis which coincides with the axis of the spindle, its ends will contact the wall of the tube and completely close the passage. The valve body is preferably formed with facets, two of which, 26 and 27, are accurately formed to correspond to the'surface of the tube which they contact when the valve is closed, and the valve is so located relatively to the inlet 'openings 21 and 22 in the sides of the tube that the facet 27 will cover the opening 21 when the valve is closed and the facet 26 will contact the tube wall above the opening 22 to prevent any vapon from being drawn therefrom by: the suction stroke of the engine piston. A shallow notch 2S is cut in the facet 27 opposite the opening 21 so that said opening will not be quite closed by the closing of the valve and the full force of the suction stroke of the engine piston will operate to draw charges through the opening 21 only.

When the valve is turned with its major axis in a vertical position, the main air passage 5 is restricted by said valve owingto its thickness intermediate its ends, leaving a crescent shaped air passage, in cross section of the tube 4, at each side of said valve, and owing to the tapering form of thevalvc, this restriction gives a venturi effect to increase the suction in the tube opposite the inlet openings 21 and 22 in the sides thereof so that when the throttle valve is open, carbureted charges will be drawn into the main air inlet from both auxiliary feed passages, and thoroughly mixed with the air rushing inward through said main air inlet.

When the carburcter is out 'of operation, the passages 11 and 12 in each feed member 8 and 9 will gradually fill with fuel up'to the level maintained in the float chamber, which level is just below the lower edge of the opening 21. In starting the motor, the operator closes the main air passage 5 by turning the throttle valve 23 to the position shown in full lines in Fig. 1. Upon the suction stroke of the motor piston, the vacuum created in the passage 5 above said valve, will draw the accumulated gasolene from the passages of the feed member 8 through the opening 21 with considerable force, spraying it into said passage through the notch 28, and sufficient air will follow in through said passages to form an explosive charge. A starting or primin'g'charge is thus provided and the drawingin-of the full charge is insured by the closin of the throt tle which closes all inlets to t e engine cylinder except 'through the feed member` Sutlicient carbureted air' will continue to-bi-l drawn through saidv feed member 8,to run the engine at low speed as long asthe throttle is lin closed position, and when the throttle isopened, the air rushing through the restricted main air assage at each side of the throttle willcharges of carbureted air from the feed member v9.'

raw in additional In Fig. 6, a modified form of throttle is shown. In this construction the facet 31 which corresponds toA the facet 2 6, is extended and formed concentric with'the' axis of rotation of the throttlefor a. short distance so that when said valve is turned to open the same,'the facet 32 corresponding to the facet27, will be moved out of contact with the wall of the tube before the facet 3l disengages the same and thus the main air passage opposite the -feed o ening 21 is opened slightly in advance o the opening of the passage opposite the opening 22. Ad-

ditionalair for running at medlum s eed.

may thus be supplied to the. carburete air which is being drawn through theopem ISy. locating the atomizing nozzles below the level of Agasolene in the'float chamber and arranging the air ducts around the out-A let of said nozzle to discharge into the jet of gasolene, the'fuel is drawn in and thoroughly atomized before it enters the main air passage, in the normal operation of the device, and when the device is out of operation the feed members fill with fuel by gravity to provide a priming charge. During the operation of the carbureter, fuel is drawn from the float chamber near its bottom through said nozzles and thus the feed will not be affected by the tipping of thepassing through said passage, of a valve p .ivotally supported in said passage and having a thickened middlev portion and tapered t0- ward its edges to produce` the effect of a venf turi restriction in said passage.

2. In a carbureter, the combination of a an even feed is' means for introducing fuel into sai through the side thereof, and a pivotally supported valve member in said assage having an enlargement intermediate its ends adJacent to its pivot to give the effect of a venturi restriction in the passage and adapted to be turned acres and close the passage. 3. In a carburetor, the combination of a member forming a main air passage, means forintroducin fuel into said passage and a valve pivota ly supported in said member upon an axis extending transversely of said passage, said valve being enlarged intermediate its ends and tapered toward each end, in section transversely of its pivotal axis, to give the effect of a venturi restriction.

4. In a carburcter, the combination of a tubular main air passage, means for introducing fuel into said passage, and a valve member 'pivotally supported upon a transveiseaxis in said passage and having an elliptical outline with its major axis extending lengthwise of said passage and thick-l ened intermediate its ends, said valve member being formed with facets to engage the wall of the air passage.

5. In a carburetor, the combination of a tubular member` forming a main air passage,

means for introducing fuel into said passage opening through'opposite sides thereof, a a valve pivotally supported in said air pastubular member forming a main vair pas-- sage, an `auxiliary airi passa sage adjacent to sa'id openin said valve bei oblong with rounded en s and a thickene middle portion andadapted to engage the wall of'said'passage between one of said openings and the discharge end 'of' the passagea'hd close lsaid passage.

` 6. In a carbureter; the combination of a through theV wall of said mem er,means forfcarbu'reting `air passing through said and a valve having auxiliary' pivotally supported in tissage, an elliptica out ine saidmain air passage. and adapted to be turned lto engage the wall of said tubular Vmember below the point -at which said auxiliary passage opens into the same-to clos'esid main passage. l

7`.'In a'carbureter, the combination of a felcha'mber, a tubular member forming a 'main air passage, a feed member extending downward in the fuel chamber to near'the bottomthereof and formed with longitudithe' atmosphere and the other being a apted to dischar e into the said tubularmember 'above the evel of fuel in the chamber, and

a needle lvalve lfor controlling the said fuel inlet.

opening and having a stem extending outward throu h one of the bores in said member.

9. )iii a. carburetor. the combination of a fuel chamber, a tubular member having openings in its sides extending through the fuel chamber in the -axis thereof and forming a main air passage, a feed member at each side of the tubular member extending downward into the fuel chamber to near the bottom thereof and each formed with an auxiliary air passage communicating with the main air passage through the openings in the sides of said tubular member` valve controlled means for admitting fuel into each of said auxiliary air passages from the fuel chamber, and a valve pivotally supported in said main-air passageland adapted to be turned to close the passage below one :of the openings .in' the sides of said tubular member and above the other of said openings.

101 In a carbureteruthe combination of a -member forming aimain air passage having openings in opposite sidesthereof, means for supplying fuel to-said-passage through said openings. and a valvepivotally supported in said passage-having a` portionat one side of its axis'of'rotation formed concentric with said axis to move adiacent to the wall'ofsaid passage over one of the-openings when the valve is turned and lhold said opening closed during a portion 'of the movement of the valve.

111 In a carburetor, the combination of a member forming amainvair passage, means opening into said passage throughmpposite sides of said member for supplyin fuel thereto, and a valve pivotally suportied upon a transverse axis in said mem'o r and formed with facets'to engage the wallfof the passage adjacent to said means, one of said facets being extended and formed ooncentric with the axisof rotation of said valve.

12. In a carbureter, the combination of a tubular member forming a main air passage and having openings in its sides for aclmission of fuel to the passage, and a valve Divotally supported upon a transverse axis in said passage to be turned to engage-the Vwall of said passage adjacent to said opening therein at one side of said valve and to In testimony whereof I aix my signature elrligage said wal abfove the said opening at in presence of two witnesses. t e opposite si e o said valve, said valve being enlarged intermediate its ends and GEORGE KINGSTON' 5 tapered toward each end and formed with lVitnesses:

a face concentric with its axis of rotation at G. E. llIoSwANirI,l one side thereof. A. M. Donn. 

